Plug Wire Resistance
08-23-10, 10:10 PM
#1
Plug Wire Resistance
Today I received a new set of Denso plug wires, and decided to get out the multimeter to compare them to the old ones.
A couple of my stock wires didn't even budge the analog meter( infinite resistance). The rest were between 40 - 100k ohms. I'm assuming this is what was causing my random misfires.
The new denso wires tested around 3k ohms, except for one of the new wires was 25k ohms for some reason. Should I be concerned with that?
A couple of my stock wires didn't even budge the analog meter( infinite resistance). The rest were between 40 - 100k ohms. I'm assuming this is what was causing my random misfires.
The new denso wires tested around 3k ohms, except for one of the new wires was 25k ohms for some reason. Should I be concerned with that?
Last edited by V8drummer; 08-23-10 at 10:25 PM.
08-24-10, 12:43 PM
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"A conventional plug wire has a resistance of 10,000 to 15,000 ohms per foot of length--if it's measurably higher, the wire probably is bad. An absolutely failed wire will have a hairline break somewhere, and the resistance will be infinity." -Popular Mechanics
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